Lin and Xu lived together in a rooftop addition in Taipei, supporting each other's dreams along the way. Now, Xu has decided to move out of the rooftop addition, while Lin chooses to stay in Taipei and continue pursuing her dreams. The red sofa left behind by the moving company opens up an opportunity for the two. They must now confront the ambiguous relationship they never openly discussed and figure out how to face the separation.

Under one roof, three generations—a trans mother, Jia-Lin; her adopted son, Yu; and a grandmother—struggle to connect and understand each other, causing their lives to drift further apart each day. While Jia-Lin strives to present herself as a strong woman at home, she finds that her only outlet for expressing her emotions is through her theater acting.